Yeah, traffic gigs are always by using bots. If they are not careful, it will show info that you would not want Google to see. It's best to do this yourself.
This is quite true, and explains how the 'traffic' generated in this fashion could be called Google or Adsense 'safe.' Google is not likely to penalize use of its own properties (You Tube, shorteners, et al) in delivering the hits to your site. Links from 'Parasite' pages (leading sites/pages that get tons of hits, from good or bad sources) are also known to be free from Google penalization. This shadow traffic can be helpful, as Google also factors in hits a site receives that are not derived from the search engines into its ranking formula. If a site gets little or no traffic other than through the search engines, Google views that situation as being also unnatural, and may de-value the site. The best use of traffic gigs comes from not depending on them primarily for SEO ranking or conversion purposes, but for secondary functions, like making the properties linking to the money site appear more natural. Web 2.0 pages, for example, often need social signals to show they are not artificially created. Some ad sources other than Adsense may ask for traffic stats that show a site has a minimum number of hits a month, before they will advertise on it. This may cause a site owner to choose to use a traffic gig in order to cheaply demonstrate that kind of traffic volume. For such purposes, the gigs serve a useful function and can be worth the money.
Indirectly, as if Google sees the non-SE hit traffic, interprets it as natural and so does not de-value the site's rank, the higher rank should translate into higher real-people search engine traffic.
Someone went to Fiverr and spent $5 for THOUSANDS of free random visitors and was shocked to find out that there were 0 conversations and 0 real people? Lol... c'mon....